>>100315254Alpha/beta/omega
It's a popular trope in slash fiction. Basically Alphas are strong, manly, well, alphas and Omegas are born solely to be fucked and get overcome by heats for their alpha. It's the new generation's version of seme/uke tropes, except now it can include male pregnancy.
Normally I think it's cringey bullshit, but for characters like Killmonger and T'Challa, who are heavily linked to wild cats like leopards, I don't mind it. China seems to especially like Killchalla ABO.